Survey data for vascular plants in 240 plots inside and outside a 900 ha area with a deer exclusion fence in Nikko National Park, Japan
https://doi.org/10.5878/mxtb-y706
The data file contains 240 rows × 126 columns.
Forest stands and plot setup:
Study area:
24 forest stands identified (12 larch, 12 oak) in the southern portion of the fenced area.
Replicate stands:
Each stand paired with a replicate within 300 m on opposite sides of the fence; stands without replicates within this distance were excluded.
Plot establishment:
Total plots: 10 circular plots per stand = in total 240 plots (120 inside, 120 outside the fence).
Plot size:
Each plot covers 10 m², centered on a larch or oak tree.
Plot layout:
Plots were placed at least 10 m from other canopy trees (>30 cm DBH) to avoid influences from species other than larch and oak.
Data collection:
Dwarf bamboo:
Average height measured from five random points per plot.
Understory vascular plants:
All species, including trees and shrubs <1.3 m tall, recorded.
Species cover:
Measured using a modified Braun-Blanquet cover class system with seven cover categories.
Braun -Blanquet scale Cover range (%) Used in calculations (%)
r <0.1
+ 0.1 – 1
1 1 – 5
2 5 – 25
3 25 – 50
4 50 – 75
5 75 – 100
*For dwarf bamboo, which was very abundant, 100% cover was used for category 5. This did not affect the calculations.
Taxonomic groupings:
Grouped species:
Dwarf bamboos: Sasa spp. (S. kurilensis, S. nipponica, S. palmata, Sasamorpha borealis).
Graminoids: Carex, Juncus, Luzula, Poaceae.
Non-flowering specimens: Rosa, Rubus, Viola (excluding Viola tokubuchiana var. tokubuchiana which was registered separately).
Maple seedlings: Acer spp. (excluding A. rufinerve which was registered separately).
Birch seedlings: Betula (B. platyphylla var. japonica, B. ermanii).
Euonymus species: E. alatus, E. macropterus, E. sieboldianus (excluding vine E. fortunei).
Nomenclature:
Follows Wamei checklist version 1.10 (Yamanouchi 2022) https://gbif.jp/activities/checklist/wamei_checklist_110
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- documentation
- Explanation_file_Plot_data20240506.txt2.8 KiB
- Explanation_file_Tree_data20240516.txt2.18 KiB
Citation and access
Citation and access
Access level:
Creator/Principal investigator(s):
- Tatuhiro Ohkubo – Utsunomiya University - School of Agriculture
Research principal:
Principal's reference number:
- SLU.ess.2024.4.4.IÄ-2
Data contains personal data:
No
Citation:
Language:
Method and outcome
Method and outcome
Time period(s) investigated:
Species and taxons:
Data collection - Field observation
Data collection - Field observation
Mode of collection:
Field observation
Description of the mode of collection:
Plot inventory in forest stands inside and outside a 900 ha deer exclusion. The cover of all vascular plant species were registered in 10 m2 plots surrounding trees of either Quercus crispula or Larix kaempferi. In the same plot, dwarf bamboo height was also measured. Tree influence index was calculated for each plot by measuring the diameter, distance and cardinal direction of trees within a radius of 7 meters (when less than 4 trees, the radius was extended to 10 meters) from the plot centre.
Time period(s) for data collection:
2022-06-01 - 2022-10-31
Geographic coverage
Geographic coverage
Geographic location:
Geographic description:
Japan, Honshu, Tochigi, Nikko National Park
Administrative information
Administrative information
Responsible department/unit:
Utsunomiya University
Commissioning organisation:
- Utsunomiya University
Funding
Funding
Funding agency:
- Japan Society for the Promotion of Science
Opens a new window at ror.org.
ROR
Award number:
PE20742
Award title:
The impact from sika deer browsing on bryophyte and lichen diversity
Funding information:
FY2020 JSPS Postdoctoral Fellowship for Research in Japan (Short-term) to conduct research in Japan for a period of 12 months.
Topic and keywords
Topic and keywords
Swedish Standard Classification of Research Subjects 2025:
INSPIRE topic categories:
Keywords:
Publications
Publications
Citation:
Petersson, L., Salk, C., Jensen, D., Thor, G. and Ohkubo, T. (2024) Long-term deer exclusion releases dwarf bamboo, reducing vascular plant diversity. Applied Vegetation Science, 8 (21) e70018.
DOI:
